Blade for a vertical windmill



FIG. 1 is a front elevational view of a blade for a vertical windmill showing our new design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a left side elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a cross sectional view taken along line 6-6 in FIG. 1; and,

FIG. 7 is a front left perspective view thereof.

The partial design of the present invention is the portion delimited by the single-dot chain lines shown in FIGS. 1 to 4 and 7.

The broken lines in FIGS. 1 to 4 and 7, showing portions of the blade for a vertical windmill, form no part of the claimed design. 

CLAIM The ornamental design for a blade for a vertical windmill, as shown and described. 